World problems

Title
Threatened species of Synhymeniida
Threatened species of Chonotrichida
Threatened species of Amphisbaenia
Threatened species of Brachycera
Threatened species of Oligohymenophorea
Threatened species of Peritrichida
Threatened species of Peritrichia
Threatened species of Actinopterygii
Threatened species of Callitrichales
Threatened species of Ophidiiformes
Extinct species of Cotylosauria
Threatened species of Myxosporea
Threatened species of Multivalvulida
Threatened species of Caryophyllidae
Extinct species of Protorthoptera
Threatened species of Suctorida
Threatened species of Malvales
Threatened species of Heterotrichida
Threatened species of Astomatida
Threatened species of Hymenostomatida
Threatened species of Scuticociliatida
Threatened species of Hymenostomatia
Threatened species of Podicipediformes
Threatened species of Nautiloidea
Extinct species of Actinoceratoidea